[Dynasty Reader] Support for Dynasty Scans images

[arisboch]

Dynasty Scans resp Reader hosts images, too and often enough they're one-shot comics, so could you please implement a download function for them? Here are a few example links (all SFW, so no girls shagging each other, just being cute and lovey-dovey):

https://dynasty-scans.com/images/1245
https://dynasty-scans.com/images/10356
https://dynasty-scans.com/images/7243
https://dynasty-scans.com/images/6912

[arisboch]

Thx!